A CTF challenge series with fun puzzles to enjoy every day
We regularly publish simple, beginner-friendly or educational CTF challenges!
Solve each challenge within its time window to appear on the leaderboard.
Discussion with friends or AI is welcome (account sharing is prohibited).
Sharing solutions is allowed only after the challenge period has ended.
Try the first challenge
Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.
k0080Want a harder challenge?
Go to B-SIDETopic: WelcomeReleased: Nov 1, 2026
B-SIDE is back this month!!!! A lineup of fun, challenging problems awaits!!!!! Give them a try!!!!!!
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A vinyl single has an A-side and a B-side. What song was on the B-side of Queen's 1977 UK single "We Are the Champions"?
Submit the song title in lowercase, replacing spaces with _, in the format Alpaca{...}.
